As a result, new diseases are emerging at an unprecedented rate.
因此，新疾病正在以空前速度出现。
However, the biological species on earth is disappearing at an unprecedented rate.
但是目前地球上的生物物种正在以前所未有的速度消失。
Greed is also the reason why people are depleting natural resources at an unprecedented rate.
贪婪也是人们以史无前例的速率耗费自然资源的原因所在。
Finally, in 1876, milk was added, and chocolate production took off at an unprecedented rate.
1876年，加入牛奶后的巧克力最终使得巧克力产业以一个史无前例的速度在腾飞。
Sea level rose and forest were destroyed at an unprecedented rate during the last decade.
过去10年，海平面升高和森林砍伐的速度都是前所未有的；
Sea level rose and forest were destroyed at an unprecedented rate during the last decade.
过去10年，海平面升高和森林砍伐的速度都是前所未有的；
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